package com.jeln.web.admin;

import com.jeln.po.Type;
import com.jeln.service.TypeService;
import com.sun.org.apache.xpath.internal.operations.Mod;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;

@Controller
@RequestMapping("/admin")
public class TypeController {

    @Autowired
    private TypeService typeService;

    //分页查询Type
    @GetMapping("types")
    public String types(@PageableDefault(size = 5,sort = {"id"},direction = Sort.Direction.DESC)
                                    Pageable pageable, Model model){
        //利用前端展示模型拿到page对象
        model.addAttribute("page",typeService.listType(pageable));
        return "admin/types";
    }

    //返回新增的页面
    @GetMapping("/types/input")
    public String input(Model model){
        model.addAttribute("type",new Type());
        return "admin/types-input";
    }

    //提交保存type  BindingResult可以接收校验之后的结果
    @PostMapping("/types")
    public String post(@Valid Type type, BindingResult result, RedirectAttributes attributes){
        //看看传过来的type是否在数据库里重复
        Type type1 = typeService.getTypeByName(type.getName());
        if (type1 != null){
            //BindingResult返回错误，加一条 name值（跟数据库一样），自定义nameError错误代码，返回的消息
            result.rejectValue("name","nameError","不能添加重复分类");
        }

        //后端校验type不能为空
        if (result.hasErrors()){
            return "admin/types-input";
        }

        Type t = typeService.saveType(type);
//        System.out.println(t);
        if (t == null){
            //如果传过来的type保存失败
            attributes.addFlashAttribute("message","新增失败");
        }else{
            //如果传过来的type保存成功
            attributes.addFlashAttribute("message","新增成功");
        }
        return "redirect:/admin/types";
    }

    //点击type编辑
    @GetMapping("/types/{id}/input")
    public String editInput(@PathVariable Long id, Model model){
        model.addAttribute("type",typeService.getType(id));
        return "admin/types-input";
    }

    //编辑修改type
    @PostMapping("/types/{id}")
    public String editPost(@Valid Type type, BindingResult result,
                           @PathVariable Long id, RedirectAttributes attributes){
        //看看传过来的type是否在数据库里重复
        Type type1 = typeService.getTypeByName(type.getName());
        if (type1 != null){
            //BindingResult返回错误，加一条 name值（跟数据库一样），自定义nameError错误代码，返回的消息
            result.rejectValue("name","nameError","不能添加重复分类");
        }

        //后端校验type不能为空
        if (result.hasErrors()){
            return "admin/types-input";
        }

        Type t = typeService.updateType(id,type);
//        System.out.println(t);
        if (t == null){
            //如果传过来的type保存失败
            attributes.addFlashAttribute("message","更新失败");
        }else{
            //如果传过来的type保存成功
            attributes.addFlashAttribute("message","更新成功");
        }
        return "redirect:/admin/types";
    }


    //根据id删除type
    @GetMapping("/types/{id}/delete")
    public String delete(@PathVariable Long id,RedirectAttributes attributes){
        typeService.deleteType(id);
        attributes.addFlashAttribute("message","删除成功");
        return "redirect:/admin/types";
    }


}
